Rtm Isdn; Isdn/Pstn Clock Source - Polycom 2000 Hardware Manual

RealPresence®Collaboration Server (RMX) 2000 Hardware Guide

RTM ISDN

The RTM ISDN card connects directly to an MPMx/MPMRx . The RTM ISDN card routes data between the
MPMx/MPMRx cards and components of the system, converts ISDN T1/E1 media to IP packets and
provides connectivity to external ISDN networks.
The RTM ISDN card connects directly to an MPMx/MPMRx. The RTM ISDN card routes data between the
MPMx/MPMRx cards and components of the system, converts ISDN T1/E1 media to IP packets and
provides connectivity to external ISDN networks.
The RTM ISDN card is installed on the rear panel of the RMX interfaces between the RMX unit and the
ISDN/PSTN switch. In an RMX with a single MPMx/MPMRx card – the
RTM ISDN card must be installed in the rear panel slot on the same level as the MPMx/MPMRx card. In an
RMX with two MPMx/MPMRx cards – the RTM ISDN card can be installed in either of the two rear panel
card slots.
Up to two RTM ISDN cards can be installed in one RMX 2000. Up to a total of 14 E1 or 18 T1 PRI cables
can be installed with two MPMx/MPMRx and RTM ISDN cards.
Each RTM ISDN card includes the following connections.
RMX 2000 RTM ISDN Rear Panel Layout
● 7 E1 or 9 T1 PRI lines that can be plugged into any of the 12 connections as shown in the figure
above.
.
E1 and T1 spans cannot be connected simultaneously to the same card, therefore, it is not possible
to have a mixed E1 and T1 ISDN Network Service
● 1 LAN port
The RTM ISDN card supports 200 audio participants, regardless of whether the spans are E1 or T1.

ISDN/PSTN Clock Source

Each RTM ISDN card has its own primary and secondary clock source. The first span to synchronize
becomes the primary clock source and the second span to synchronize becomes the secondary clock
source. This clock is used to synchronize ISDN spans only (it is not the system clock).
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